Aggregate drier



K. A. RAYPHOLTZ April 11, 1950 AGGREGATE DRIER Filed June 5, 1946 m Mm RPatented Apr. 11, 1950 asoass AGGREGATE DRIER.

Kenneth A. Raypholtz, Marion, Ind., assignor to vOvermander.Machine,Ina, Marion, Ind., a corporation Application June 5, 1946, Serial No.674,423

. '8 Claims. 1 This invention relates to a drier structure foraggregates and the like.

The chief object of .thisinvention is "to-provide a drier of extremesimplicity and one which is capable of disassembly for interior access.for

repair and replacement purposes and one where-' in the aggregate istumbled .by reason'of rotation of the drier drum and is advanced fromthe inlet to the discharge end thereof by what might be termed generallyahelical like series of transfer pocketsassociated with diametricallypositioned dams.

The chief feature of the invention resides in providing a structureincluding theaforesaid and associatingthesame'with a flame'unit,the-latter discharging to'a combustion chamber juxtapositioned to thedischarge end of the drier, the intake end being suitably muffled, andassociating therewithbetween the combustion-chamber and the dischargechamber'an igniter.

One specific feature of the invention resides in the circular offsetsuccessive transferpockets upon the drier interior, and associatingwith-each in diametrically opposed relation an interior dam.

Gther objects and features of the :invention will be set forth morefully hereinafter.

'Thezfull nature of the-.invention-will be understood from theaccompanying drawings and the following description and'claims:

Inthe drawings I f Fig. 1 is aside elevation of a drier unit embodyingthe invention, parts being :broken away toshow the same'and other partsin'section.

Fig. 2 is an end View of the drier.

Fig. 3 is a developed plan view of a portion of :the drum interiorshowingrthe transfer pockets. 1 H I .Fig. 4 is an end ;elevational viewof 'theigniter mechanism and thecombustion chamber together with theassociated control "circuit.

In Figs. 1 and 2 of thedrawings, l and H indicate suitable supports inspaced relation thatterminate .in anarcuate cradle 12, and associatedtherewith is a plurality or rolls. [3 by which the circular rings M arerotatably supported. L

These circular rings are hereinl 'shown as 0i angle'section'see Ma.'On'eof the rings carries, by means of brackets l 5 a sprocket I6,andmeshingztherewith is a chain 7 driven 'bya sprocket pinionIBcarried by ashait l9, see Fig. 2, this shaft'heingisuitably driven. j

Herein the drum proper includes three sections, A, 'B, and 0,101convenience, and the same have an exterior shell portion 20 and aninterior shell 2|. ,Therebetween preferably is included insulation 22.

The shells aremaintained in spaced relation by means of annular discs 23and 24 and the intake end includes the disc 25. The flange structures Maare carried between discs Hand 25,.as shown.

It will'be'noted that at the intake end, which is the larger end of thedrier, the shells 2fl-and 2| have inwardly directed flanges, same beingsuitably'secured to the disc 25, and tothe same also is secured'armuiiledstructure 25. The discharge end of the drier issimilarly'formed 'by. inwardly directed flanges, as indicated at 128..If desired, the several sections, A, B and C, may be detachablyassociated together so that access may'berhad'from either end ofeachsection, when disassociated, for removal of damaged parts within thedrier and replacement of parts'for renewal purposes;

It is to be understood that the aggregate is supplied at the open mouth29 of the mufiie structure and'by any suitable means, see dotted lines.

The discharge is efiected-at the opposite end 3U-of the drier,whichis'oi lesser "diameter-than the intake ,endof the'drier, althoughthe muflle intake 29 is of 1185581 diameter.

.Adjacent the ;dischargeendof the drier is any suitable discharge means,or the same may be omitted whenever desired or required. However,

inspaiced relation-to and'coaxial withthe drum,

which although of conical type is mounted for rotation on the horizontalaxis, is a refractory ignition tile element 3| suitablywsupported andhaving an oppositely directed conical interior 32 providing a combustionchamber 33.

vAt the more remote-and smaller end of this combustion chamber there isprovided an :oil and gas burner unit having the nozzle 34 into thecombustion chamber and preferably axially lined therewith butlongitudinally spaced from that chamber to permit air entrance forcombustion purposes.

.Interposed between the discharge end of the drier and the discharge endof the combustion chamberand movable intothe gap therebetween isan'igniter structure indicated-generally by the letter D in Fig. 1 andshown more particularly in igf :Herein there .is .pivotally supportedvon support 35 a T-shaped lever having the .arm .3fi,. th.e arm 3'landthe arm 38. Thearmtfl .adjustabl supports at. an igniterstructiu'e 40having .the:

spaced and insulated electrodes 4| and 42 projecting therefrom.

The arm 36 includes a threaded extension 43 upon which is adjustablymounted a counterbalancing weight structure 44 locked in the adjustedposition as at 45. The arm 31 is connected as at 46 to a link 41pivotally connected at 48 to the core 49 of a stationary solenoid 50.

L and L indicate respectively the supply lines from a supply circuit notshown. It is to be understood that the support 35 is suitably supportedand that the solenoid 50 is stationarily supported by suitable means,not shown.

The solenoid 59 is connected by line I to line L and it is alsoconnected by line 52 to one terminal 53 of a push button switch havingthe actuating portion 54. The other contact of this switch is connectedby line 55 to line L Therefore, whenever the push button switch isclosed the solenoid 50 will be energized and the arm 31 will be rotatedclockwise upon the support 35, thereby rotating clockwise the igniter40.

Such rotation positions the igniter 40 in the gap and in partialregistration with the discharge end of the drier and the discharge endof the combustion chamber so that the combustible mixture then in thechamber will be ignited, and thereafter the flame will be directedinwardly and axially of the drier structure.

In Fig. 4, primary of a transformer T is indicated by the numeral 56 andsame is connected by line 51 to line L The other terminal of thetransformer primary is connected by line 58 to line L In other words,the primary is always across the line in the present illustratedcircuit.

Associated with this primary is a secondary 59, and it has one terminalconnected by line 69 to a terminal 6|. The other terminal 52 isconnected by line 63 to one electrode, to-wit, electrode 42. The otherterminal of secondary 59 is connected by line 64 to the other electrode4 I A line 65, connected to line L in turn is connected to a relay 66,the other terminal of which is connected by line 51 to the line 52 orcontact 53.

This relay controls a bridging contact 68 so that when the push button54 is closed the relay will be energized, the bridging contact 68 willbe elevated and close the circuit across the contacts BI and 62, therebyclosing the circuit through the secondary and. to the electrodes 4I-42.

At such time the spark passes between electrodes ll and 42. In otherwords, solenoid 50, relay 56 and primary 66 are all standard or lowvoltage units while the secondary 59 and igniter 40 are hi h voltageunits, and the igniter is only energized for ignition purposes when thepush button 54 is closed, which means the igniter is only energized forignition purposes when the igniter is interposed between the combustionchamber and the discharge end of the drier.

Reference will now be had to certain of the cutaway portions of Fig. 1and Fig. 3. Therein it will be noted that the interior 2I of conicaldrier shell or drum is provided with inwardly directed annular vanes orpartitions designated by the numeral Ill. These may be of any radialwidth and may be spaced apart longitudinally as desired or required.

Between each adjacent pair of circular vanes III is a longitudinallydirected dam II. Diametrically opposite the dam II which is radiallpositioned, there is provided an inclined dam I2, and the same isinclined, as shown in Fig. 3, relative to the direction of rotation ofthe drier.

Adjacent the junction of the inclined dam I2 and the adjacent circularvanes I0 there is a gap I3 so that as a result of the direction ofrotation the aggregate engaging the dam I2 slides from one annularportion of the drier into the next succeeding portion of the drierdefined by the next adjacent pair of substantially circular vanes III.The gap and inclined dam may be termed a transfer pocket arrangement.

It is to be understood, as stated initially herein, that diametricallyopposite each inclined vane I2 with the adjacent throat 13 there isprovided a radial vane H.

As the drier rotates the aggregate picked up by the vane II is carriedupwardly until it drops downwardly from the inside shell 2|. As it dropsdownwardly it drops into substantially the same annular portion of thedrier but by reason of the inclined vane '12 is caused, in drierrotation, to advance from the intake end to the discharge end. It is tobe understood that each successive circular portion of the drier isprovided with at least one radial vane and a diametrically oppositetransfer pocket. Preferably, however, a plurality of the aforesaid areprovided as shown in Fig. 3.

It is furthermore to be understood that the radial vanes by reason ofthe diametrical positioning and the transfer pockets are helicallyoffset,

as it were, with respect to successive circular portions of the drierinterior.

In other words, it might be said that there is a helical like series oftransfer pockets and a helical like series of radially directed vanes ordams associated with circular channels, the adjacent channelssuccessively communicating with adjacent the pockets for aggregatetransfer purposes.

The foregoing description applies to one series of pockets from end toend and one series of radial dams positioned from end to end of thedrier. Obviously for efiicient operation there are a plurality of suchseries and, as shown in Fig. 3, by way of example only.

It also is to be understood that the number of such pockets anddiametrically positioned radial vanes or dams need not be the same innumber throughout the drier. In other words, it may, if desired,include, for example, twice as many cooperating pairs of dams andpockets at the larger intake end as may be found or utilized at thedischarge end so that the term helical like series does not byimplication require that there be the same number in each longitudinalsection of the drier, considered from end to end.

While the invention has been illustrated and described in great detailin the drawings and foregoing description, the same is to be consideredas illustrative and not restrictive in character.

The several modifications described herein as well as others which willreadily suggest them her, and a conical drier drum, all in longitudinalalignment and spaced one from the other and substantially horizontallydisposed, the chamber and. drum being similarly directed with flame andaggregate flow therethrough, respectively, in opposite directions andaggregate and flame flow in the drum of counter-flow type, the largerend of the chamber and. the small end of the drum comprising therespective discharge ends, the drum discharge end exceeding in area thatof the chamber discharge end and the inclination of the chamberexceeding that of the drum.

2. A drier structure as defined by claim 1 wherein muflle means ofperipheral and bell-like character is provided at the large end of thedrum and is centrally apertured for a combination aggregate intake andgas outlet opening of an area less than that of the drum discharge areafor combustion products flow retardation towards dis charge.

3. A drier structure including a multi-section conical drum comprised ofsuccessive conical sections detachably secured together, the drum beingdisposed for rotation upon its longitudinal axis, the smaller endcomprising the discharge, bellmouth shaped mufile means at the largerend and having a single coaxial intake opening of an area less than thatof the discharge, and means only upon the interior of each section ofsaid drum for content peripheral advancement there-v through incident todrum rotation, and readily accessible from either end of the meanssupporting section for replacement and repair purposes.

4. A drier structure including an elongated conical drum disposed forrotation upon a horizontal axis, the smaller end comprising thedischarge, longitudinally spaced circular-like vanes in spaced relationupon the drum interior, radial like dam members between adjacentcircularlike vanes, and transfer pocket means between adj acentcircular-like vanes positioned substantially diametrically opposite theradial vanes for content advancement longitudinally of the drum andupwardly to the discharge end incident to drum rotation.

5. A drier structure as defined by claim 4 wherein longitudinallysuccessive pocket means and 6 opposed radial vanes are eachprogressively 011- set circumferentially in successive circularchannels.

6. A drier structure as defined by claim 4 wherein each circular channelincludes a plurality of radial dams and opposed transfer pocket means,same being alternated.

7. A drier structure as defined by claim 4 Wherein longitudinallysuccessive pocket means and opposed radial vanes are each progressivelyoffset circumferentially in successive circular channels and eachcircular channel includes a plurality of radial dams and opposedtransfer pocket means.

8. A drier as defined by claim 4 wherein the pocket transfer means andradial vanes from end to end of the drum, each are substantiallyhelically disposed upon the drum interior.

KENNETH A. RAYPHOLTZ.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 685,243 Atwood Oct. 29, 1901743,538 Michaelis, Jr Nov. 10, 1903 1,142,841 Raleigh June 15, 19151,317,686 Chappell Oct. 7, 1919 1,435,930 Laury NoV. 21, 1922 1,703,635Ranson Feb. 26, 1929 1,758,778 Bauchere et a1 May 13, 1930 1,797,831Luther Mar. 24, 1931 1,818,616 Good 1 Aug. 11, 1931 1,830,474 Macrae eta1. Nov. 3, 1931 1,882,421 Hedrick Oct. 11, 1932 1,898,776 Horn et alFeb. 21, 1933 1,937,094 Palmer Nov. 28, 1933 1,973,002 Kroepfle Sept.11, 1934 2,049,734 Fasting Aug. 4, 1936

